Peters



' 6 Sheets Sheet 1.

(No Model.)

G. ALEXIS-GODILLOT.

FIRE GRATE. N0.297,548.

Patented Apr. 22, 1884.

' WITNESSES:

(No Model.) 6 eeeeeeeeeeee 2.

G. ALEXIS-GODILLOT.

FIRE GRATE.

' N0. 297,548. Patented Apr. 22, 1884.

Fig.5 1 1%.?

IYINVE'NTOR- (No Model.) 6 Sheets-Sheet 3 G. ALEXIS-GODILLOT.

' FIRE GRATE.

No. 297,548. Patented Apr. 22,1884.

Fig.3 Figll WITNESSES:

V I! mz'it pmezs,

(No Model.) G'Sheets-Sheet. 5.

FigEO Fig.2 2

' III 7 WITNESSES: NVENLQB I MHZ-5V By his .flttorlwys,

N4 PETERS, fimwullm ra lm, Waihinglon. QC.

6 Sheets-Sheet 6.

(No Model.)

' G. ALEXIS-GODILLOT.

FIRE GRATE.

No. 297,548. Patented'Apr. 22, 1884.

Fig.2 '5

Fig.2 5

iNVENTOR:

By his flttor-neys, M

\ogmphcr, wan-mm u c WITNESSES:

GEORGES ALEXISC-lODILLOT, OF PARIS, FRANGF.

FlRE-GFiATE.

I SPECIFICATION forming part of Letters Patent No. 297,5'l8, dated April 22, 188%.

, Application filed January 15, 1884. (No model.)

To mZZ whom, it may concern:

Beit known that I, Gnonons ALEXIS-GO- YDILLOT, a citizen of the French Republic, and

a resident of Paris, France, have invented certaiiil Improvements in Furnaces, of which the following is aspecifieation.

My invention relates to that class of furnaces designed especially for burning wet fuel,

" be seen in the Letters Patent of Alexis Godil lot, No. 208,730, dated October 8, 1878. In

I this patent the fuel-receiving grate is in the form of a hexagonal pyramid set in the center of the furnace, and raised above the horizontal grate. The fuel enters at the top over the apex of the pyramidal grate.

In, constructing my furnace Imake the firebed upon which the fuel is burned somewlmt in the foriin of half a bell or dome set against the wall of the furnace, and arrange the chargingopening at the apex of said fire-bed, either in the vertical wall of the furnace or in its roof. Theinelined fire-bed may be plain and unperforated, as where it is designed for burn- I ing wet fuel, or partly perforated, especially near the base, or grated, either horizontally or vertically, or perforated throughout. I,

usually arrange an ordinary horizontal grate at the base of my bell-like fire-bed to receive the cinders, and also to receive such fuel as may not be entirely consumed on the bell-like fire-bed. V k

In order that my invention in ay be fully understood, I have shown it in various modified forms in theIaccompanying drawings, wherein likeletters of reference designate like parts of the furnace in general.

' Figure 1 is a vertical section on line 1 1. in Fig. 2, and Fig. 2 is a horizontal section through the walls only on line 2 2 in Fig. l of one form of my furnace. A is the fire-ehamber or combustion-chamber. 13 is a horizontal grate to receive the cinders. I) is the fine for the flames and gases. Dis the door or opening whichadmits air to the furnace for combustion. Fisthe charging door or opening. GG are openings, arranged to suit the circumstances, for clez'tning the furnace, and H is my semi-bell-like fire-bed, before referred to. This fire-bed is set with its back against the furnace-Wall, and in these views is shown unperforated.

Figs. 3 and AL are respectively a vertical and horizontal section, showing the fire-bed II, of a frusto-pyramidal form, with three plan e faces, grated with bars running from the apex toward the base.

Figs. 5 and (3 illustrate a modification in which the fire-bed II is in the form of a semipyramid, in, combination with a wedge, the five faces being grated with bars extending from the apex toward base.

Figs' 7 and 8 illustrate a modification in.

Whichthe iire bed II is a grated semi-cone,

with the bars extending from the base up the I side or face of the cone.

Figs. 9 and l0illustrate a modification in .whichthe fire-bed II is in the form of a semicone, in combination with a wedge, the sides or faces being grated, as in Figsfi, 6, 7, and 8. Figs. 11 and 12 illustrate a modificationin which the firebed H is of semi-ovoid or dome form an d perforated. This form is well adapted to the employment of ceramic materials in the Fig. 19 illustrates a means for automatically feeding the fuel to the furnace.

Fig. 20 illustrates a means of charging the furnace from above, and a means of keeping the. charging-chute cool.

nace to a locomotive.

Figs. 22, 23, and 2a illustrate means of heat ing air and mixing it with the burning gases in a tortuous flue leading from the furnace.

Fig. 25 illustrates the construction when the furnace is designed for burning liquid fuels, as oil, as. V

In Figs. 7, 11., and 20 the charging-aperture is arranged in the roof of the furnace. In 1 and f) it enters obliquely. In the re- Fig. 21 illustrates the application of myfurQ maining figures it is arranged in the furnacewall.

pass up through the openings in both H and B to support combustion, and I prefer to an range B'a little below the level of the base of H, and was to project under the latter a little, as shown in the various figures. The gas and flames pass off through D. The openings G are by preference arranged on a level f with the grate B, so as to facilitate the removal of clinkers, Ste, therefrom. The arrangement of the grate B a little below the base of H also facilitates the removal of cinders and clinkers from the said grate.

In cases where the fire-bed H is perforated or grated the size and character of the openings will be governed by the nature of the fuel. \Vhere the particles of the fuel are large or coarse, the bed may be grated with the bars and slats extending from apex to base, as in Fig. 5, for example. If thefuel is pulverized or fine, in place of bringing the bars of the grate closer together it is preferable to arrange them horizontally, and give them some suitable formas, for example, like those shown at the left in Fig. 15, or inclined, as shown in Fig. 16; or they may be given a louver form, with various inclinations, as shown at the right in Fig. 15, and in Figs. 17 and 18. In all of these constructions the air is permitted to pass freely; but even the finest particles of the fuel will not pass.

In lieu of grating the bed H, it may be perforated, as shown in Figs. 11 and 12, and the holes may be horizontal or inclined downward.

As the grate B serves only a secondary purpose, and usually performs only the part of a receiver for the cinders, I may sometimes replace it by a plain unperforated plate.

WVhere fuel is burned that must be previously dried-as wet tan-bark, for eXamplethe fire-bed Hserves admirably for a drier. In this case it may be wholly unperforated and the combustion effe cted on the grate B, or it may be perforated or grated only at the base.

In Fi 20 I have shown means for charging the furnace from above. This comprises a chute or tuyere, I1, slightly tapered toward the top to prevent clogging. This chute may be provided with a water-j acket, M, at its base 7 to prevent the temperature from getting high enough at that point to melt or cake the fuel, and thus choke the chute.

In Fig. 19 I have shown a mechanical feeder, which comprises a conveyer or screw, K, arranged to be rotated in the base of a hopper, I, and to force the fuel into the furnace through aperture F. This screw may be rotated continuously by a pulley and belt.

The chamber A may have almost any form. 7

I have found that shown in Figs. 13 and 14., where the internal contour of the chamber is substantially parallel to the exterior surface or contour of the fire-bed H, to produce excellent results.

VVhere the furnace is employed for heating steam-generators or the like, the furnace may be arranged directly under said generator, as shown in Fig. 19, wherein W represents the generator. Generally one furnace will be sufficient to heat a battery of several generators or boilers; but I may arrange a series of two or more fire-beds H side by side in one chamber A.

Fig. 25 illustrates the construction of the furnace when liquid fuel is .to be burnedsuch as naphtha, crude oil, &c. The liquid is introduced through a pipe, N, and falls on the apex of the bed H, which in this case is constructed similar to that shown in Fig. 17. I may, however, provide ledges along the outer edges of the bars of the grate to form channels or basins, which collect the oil, which then overflows into the next below in a cascade. This serves in some measure as a retardant to prevent the liquid from flowing too fast, and spreads and diffuses it thoroughly. In this case the grate B is replaced by a shallow pan or tray to receive such small portions of the liquid as may escape from H unburned. This will burn in the pan.

In order to insure a more perfect combustion of the gases, I may employ the constructions shown in Figs. 22, 23, and 24., in which air is admitted through lines or passages Q,

either in a partition-wall, P, as in Figs. 22 and 24, or in the bridge-wall, as in Fig. 23. The

\ air is heated in its passage through Q, and is discharged through small apertures 0 0 into the contracted gasoutlet B. The gases then pass through atortuous passage, S T, in which they become thoroughly mixed and-ignited. In Figs. 22, 23, and 24. I have also shown a recess or cavity, II, formed between the grate B and the bridge-wall, which facilitates the cleaning of said grate. This space or recess forms a sort of supplementary cinder and ashes receptacle.

My improved furnace being adapted to ef feet a continuous and uniform combustion of the fuel, it follows that the heat generated will be uniform, and no regulating-dampers will be required. The draft may be regulated once for all, and will not require to be'changed.

The essential characteristic of my furnace is the fire-bed H, constructed in a semi-belllike form, as shown, and placed with its back or vertical face against the furnace wall.

This should be constructed, as to the slope of its sides, according to the character of the fuel used, and should be such that the fuel will move gradually down the slope from apex to base, spreading and diffusing itself over the gradually-increasing area of grate-surfaoe as it goes. Thus the maximum economy in combustion is attained. I may make the fire- ,bed I-Iof metal, fireiclay, or any suitable refractory material, and it may be simply set in place, so as to be' readily "removed when worn claim- 1. In a furnace, a fire-bed,I-I, constructed.

in the form of a semi dome, bell, cone, or pyramid, substantially as shown, and set with its back or vertical side against the wall of the furnace, and said fire-bed arranged with relation to the fine D, as shown, and adapted to operate substantially as set forth.

2. The combination, with a furnace-chamber constructed, as shown, with a chargingopening at its upper part, of the fire-bed H, of the form shown and described, set with its back or vertical face against the furnace-wall, and arranged with relation to the fine D, as shown, and the horizontal grate I3, all arranged substantialh as set forth.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses. t.

, GEORGES ALEXIS-GODILLOT.

Witnesses:

Rona. M. Hoornn, ABMENG-A'UI), Jeune. 

